| Title | In situ, microanalytical sulphur and lead isotopic compositions of sulphide indicator minerals from surficial sediments in southwestern Northwest Territories |
| Download | Downloads |
| |
| Licence | Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences. |
| Author | King, R D; Piercey, S J; Paulen, R C |
| Source | Geological Survey of Canada, Open File 8449, 2018, 14 pages, https://doi.org/10.4095/311247  Open Access |
| Year | 2018 |
| Publisher | Natural Resources Canada |
| Document | open file |
| Lang. | English |
| Media | on-line; digital |
| File format | readme
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| File format | pdf (Adobe® Reader®); rtf; xlsx (Microsoft® Excel®) |
| Province | Northwest Territories |
| NTS | 85C; 85D; 85E/01; 85E/02; 85E/03; 85E/04; 85E/05; 85E/06; 85E/07; 85E/08; 85E/09; 85E/10; 85E/11; 85E/12; 85F/01; 85F/02; 85F/03; 85F/04; 85F/05; 85F/06; 85F/07; 85F/08; 85F/09; 85F/10; 85F/11; 85F/12; 95A;
95B/01; 95B/02; 95B/07; 95B/08; 95B/09; 95B/10; 95B/15; 95B/16; 95G/01; 95G/02; 95G/07; 95G/08; 95G/09; 95G/10; 95H/01; 95H/02; 95H/03; 95H/04; 95H/05; 95H/06; 95H/07; 95H/08; 95H/09; 95H/10; 95H/11; 95H/12 |
| Area | Mackenzie River; Great Slave Lake; Sambaa K'e; Trout Lake; Ka'a'gee Tu; Kakisa Lake; Lue Túé Sulái; Jean Marie River; Tathlina Lake; Liard River |
| Lat/Long WENS | -123.0000 -116.2500 61.6667 60.0000 |
| Subjects | economic geology; geochemistry; surficial geology/geomorphology; mineral deposits; sulphide deposits; gold; copper; lead; zinc; mineral occurrences; mineral exploration; exploration guidelines;
mineralization; ore mineral genesis; drift prospecting; isotopic studies; lead isotope ratios; sulphur geochemistry; sphalerite; galena; chalcopyrite; arsenopyrite; source rocks; source areas; sediment dispersal; dispersal patterns; bedrock geology;
lithology; igneous rocks; intrusive rocks; kimberlites; structural features; fault zones; faults; scanning electron microscope analyses; spectrometric analyses; mass spectrometer analysis; Pine Point Deposit; Western Canada Sedimentary Basin;
Canadian Shield; Canadian Cordillera; Fort Simpson Formation; Olivut Kimberlite; Trout Lake Fault Zone; Rabbit Lake Fault Zone; Tathlina Fault Zone; Cameron Hills Structure; Howard's Pass Deposit; Selwyn Basin; Blende Deposit; Tom Deposit; Giant
Mine; Meguma Gold Deposits; Phanerozoic; Cenozoic; Quaternary; Mesozoic; Cretaceous; Paleozoic; Devonian; Precambrian |
| Illustrations | geoscientific sketch maps; plots; histograms |
| Program | GEM2: Geo-mapping for Energy and Minerals Mackenzie Corridor, Southern Mackenzie Surficial Mapping |
| Released | 2018 10 10 |
| Abstract | This report presents analytical data from sphalerite, galena, chalcopyrite, and arsenopyrite grains recovered during recent surficial sampling programs in the region southwest of the headwaters of the
Mackenzie River, Northwest Territories. Many samples were found to contain high numbers of sulphide mineral grains for which there is no known local source. Lead and S isotopic determinations were conducted to evaluate if the sulphide grains could
have been transported from the nearest known source, the Pine Point Mississippi Valley-type district, or whether the grains are sourced from yet-to-be-discovered bedrock mineralization. Lead isotopic values from galena grains (207Pb/204Pb = 15.57 to
15.70; 206Pb/204Pb = 18.00 to 18.20) indicate a more radiogenic source than the Pine Point district and are, therefore, likely to have been locally sourced. Sulphur isotopic values from galena grains range from 0 to 27 permille delta-34S, comparable
to Pine Point and other Mississippi Valley-type deposits globally, indicating that similar styles of mineralization may occur in the region. Chalcopyrite delta-34S values range from -22 to +28 permille, indicating that the grains are sourced from
either sediment-hosted Cu or Manto-style mineralization. Arsenopyrite delta-34S values indicate a sulphur source similar to orogenic gold deposits near Yellowknife, Northwest Territories, and are likely derived from the Canadian Shield, north of the
study area. |
| Summary | (Plain Language Summary, not published)
As part of the Northwest Territories Protected Area Strategy (PAS) several candidate areas were assessed for the potential to host economic bedrock
mineralization. Samples from these surveys yielded interesting results, with many samples containing elevated numbers of base metal indicator minerals. This data will assist in the efforts to learn about potential base-metal enriched sources that may
occur in the region. Initial results of in situ sulfur and lead isotopic analyses of sulphide grains are reported and compared with previous studies. |
| GEOSCAN ID | 311247 |
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